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Home > News/Release (News up till now) > Color Top 9000CD Shaftless Web Offset Press & Color Top 4100CMUD Shaftless Web Offset Press
  – New Product Introduction –
Color Top 9000CD Shaftless Web offset Press

As a new model of the Color Top series, manufacturing of the Color Top 9000CD shaftless web offset press (6-page wide by 2-page around) with specifications for the overseas market was completed and actual on-site operation in Portugal started at Mirandela Artes Graficas S.A. in October 2006.

Our commercial shaftless web offset press the Color Top 8200CMCD  is already running at the company and this press is the second installation making it our first newspaper tower offset press to operate in Europe.  For the maximum 2400mm width by 560mm cutoff specification, development was undertaken in June 2005 utilizing the knowhow from the first domestic Color Top 9000CDH, 6 x 2 press, that made its live print debut at drupa 2004.

This tower web offset Color Top 9000CD press, aimed mainly for the U.S./European newspaper market, features a couple drive and a shaftless system, with a top speed of 90,000 copies per hours (cph).  Having a main cylinder that is capable of printing newspaper pages of 6-page across by 2-page around, the press is able to print 1.5 times more than conventional 4 wide by 2 around newspaper presses making it possible to reduce the number of printing units needed for printing large multi-page products.   At the same time, because the press installation surface area can be reduced, the printing plant area becomes smaller lowering the overall initial cost.

For running cost likewise, there are fewer number of pasters and shorter web paths resulting in less waste, and by using a “Twin Turbo” device to vacuum paper dust and lint out of the running web, the burden of the blanket wash is drastically lowered.  All of these advantages contribute to lower power consumption and less maintenance work.

Although the plates used are large, 3-page wide by 2-page long, with the use of our special toolless lockup mechanism and the reverse mechanism of our main cylinders, plate mounting and dismounting can easily be done.

The inking device is a high speed digital ink pump system and the water dampening device is a Tohki Electronics TSD-2000S (12-nozzle type).  For the 6-page paper width, the proven Color Top system’s Super Register Device (SRD) is utilized so that fan-out is practically eliminated providing excellent registration.

Fortified with these innovative features, not only newspapers but flyers and such using woody paper can be printed with good quality.  Furthermore, by using two tower units for a “flying plate change” function news content can be changed without stopping the press.  Equipped with such features as a 2:5:5 jaw folder, a chopper folder, skip slitters, a tabloid stitcher and collect stitcher, various fold specifications can be met.

The first set consists of five units of 4 x 4 color towers, 2 folders, and five reelstands.
Color Top 4100CMUD Shaftless Web Offset Press

Production of the commercial shaftless offset press, the Color Top 4100CMUD [1092 x 880mm (43” x 34 1/2”) size], which is another new addition to the Color Top series was completed and installed at Chubu Kyodo Printing Company, Ltd.  Whereas the norm in commercial web printing would be to run one web horizontally, TKS, in November of 2005,  started development of the heatset tower type web press with the goal of further improved productivity underlined by the concept of achieving optimal space utilization, high speed but reliable printing, and superb print quality.

The Color Top 41000CMUD is a shaftless web offset press equipped with a unit drive system.   The computer that controls this mechanism is a high-accuracy position controller, the Advanced Drive System (ADS), that is capable of controlling the plate cylinder surface to a resolution of 3μm which makes it possible for synchronous control from low speed to high speed assuring superb registration.  The overall specs are:

Printing circumference : 1092mm
Max. paper roll width : 880mm
Max. cylinder revolution speed : 600 rpm
Jaw folder and chopper folder : B4 (250 x 353mm) & B5 (176 x 250mm) products

The press layout consists of one unit each of:   Reelstand unit – Infeed unit – 4-stacked arch type printing tower unit – Air-turn device – Dryer – Chill unit; plus two folders.  The overall height is 8.5m and the overall length including spacing for the stack-bundler and palletizing robot units is 25m.  The printing unit includes such features as three ink form rollers, a continuous water feed dampening system, and inking cylinders with cooling devices.

Ghosting phenomenon is controlled by the oscillating ink form and water form rollers, and as the dampening roller is a force-driven type it is effective in preventing lint on the plates.   The dampening rider roller has a bridging mechanism so that ink that is caught on the dampening roller can be returned to the ink roller, thus ink residue is kept to a minimum.

Further, with the use of the Rilsan roller for continuous ink feed, and segmented ink keys with special motorized screws that open and close stable ink supply is assured within a design geared for print quality during high speed printing.

The folding unit is a jaw type with the cutting cylinder, folding cylinder and jaw cylinder at a 2:3:3 ratio.  By adding a chopper folding device and a vertical and horizontal perforator, a diverse fold specification can be met.

With straight and collect run selectability and a two-folder setup, folder dimensions of B4 (250 x 353mm) size of 4, 8 and 16 pages, B5 (176 x 250mm) size of 8, 16 and 32 pages are possible.

Additionally, by putting two lines facing each other and using a crossover device 2 webs can be overlapped to produce 32 pages of B4 size, and by attaching a folder unit to the BH-5000ED, 2-page products of B4 size can be produced.

By providing such features as lap adjustment on the fly, one-touch switchover between B4 and B5 sizes, presetting of former positions according to paper width, and the capability to track chopper timing speed a high level of folding precision can be assured for publication printing with the benefit of ease of operation and reduction in press makeready time.

Two sets of Color Top 4100CMUD have been delivered to Chubu Kyodo Printing Co. Ltd. with one set going on operation in the latter part of November 2005 and the 2nd set in the middle of December 2005 work centering on printing such items as flyers and publication products is going on in full operation.
 
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